Open message error between iBGP peers

[pavlosd]

We are trying to establing an ibgp session between a Cisco 3600 series running IOS IP Plus 12.3 and an Ericsson node running Gated over VXWorks platform. We have used the following configuration as far as the cisco is consirned:

router bgp 64445

no synchronization

bgp log-neighbor-changes

neighbor 192.168.130.249 remote-as 64445

neighbor 192.168.130.249 description Gp BG to Gn1

neighbor 192.168.130.249 send-community extended

neighbor 192.168.130.249 soft-reconfiguration inbound

neighbor 192.168.130.250 remote-as 64445

neighbor 192.168.130.250 description Gp BG to Gn2

neighbor 192.168.130.250 send-community extended

neighbor 192.168.130.250 soft-reconfiguration inbound

The following erros are encountered on the VXWorks site (Gated).

Open message error code 2. Authentication failure (Sub 5).

Regards.

[Harold Ritter · Accepted solution]

The issue is due to the Ericsson node not complying to RFC2842 (Capabilities Advertisement with BGP-4) and therefore can't handle the capability option in the open message coming from the Cisco router properly. There is a hidden command that you can use in IOS to revert to a pre-RFC2842 behavior. This command is :

nei x.x.x.x dont-capability-negotiate.

This should solve your issue.

Hope this helps,